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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.2//EN">
<HTML><HEAD><TITLE>Fstopgm User Manual</TITLE></HEAD>
<BODY>
<H1>fstopgm</H1>
Updated: 06 April 89
<BR>
<A HREF="#index">Table Of Contents</A>
<H2>NAME</H2>
fstopgm - convert a Usenix FaceSaver(tm) file into a PGM image
<H2 id="synopsis">SYNOPSIS</H2>
<B>fstopgm</B>
[<I>fsfile</I>]
<H2 id="description">DESCRIPTION</H2>
<p>This program is part of <a href="index.html">Netpbm</a>.
<p><b>fstopgm</b> reads a Usenix FaceSaver(tm) file as input and
produces a PGM image as output.
<P>FaceSaver(tm) files sometimes have rectangular pixels. While
<B>fstopgm</B> won't re-scale them into square pixels for you, it will
give you the precise <B>pamscale</B> command that will do the job.
Because of this, reading a FaceSaver(tm) image is a two-step process.
First you do:
<PRE>
fstopgm > /dev/null
</PRE>
This will tell you whether you need to use <B>pamscale.</B>
Then use one of the following pipelines:
<PRE>
fstopgm | pnmnorm
fstopgm | pamscale -whatever | pnmnorm
</PRE>
To go to PBM, you want something more like one of these:
<PRE>
fstopgm | pamenlarge 3 | pnmnorm | pamditherbw
fstopgm | pamenlarge 3 | pamscale <whatever> | pnmnorm | pamditherbw
</PRE>
You want to enlarge when going to a bitmap because otherwise you lose
information; but enlarging by more than 3 does not look good.
<P>FaceSaver is a registered trademark of Metron Computerware Ltd. of
Oakland, CA.
<H2 id="seealso">SEE ALSO</H2>
<A HREF="pgmtofs.html">pgmtofs</A>,
<A HREF="pgm.html">pgm</A>,
<A HREF="pnmnorm.html">pnmnorm</A>,
<A HREF="pamenlarge.html">pamenlarge</A>,
<A HREF="pamscale.html">pamscale</A>,
<A HREF="pamditherbw.html">pamditherbw</A>
<H2 id="author">AUTHOR</H2>
Copyright (C) 1989 by Jef Poskanzer.
<HR>
<H2 id="index">Table Of Contents</H2>
<UL>
<LI><A HREF="#synopsis">SYNOPSIS</A>
<LI><A HREF="#description">DESCRIPTION</A>
<LI><A HREF="#seealso">SEE ALSO</A>
<LI><A HREF="#author">AUTHOR</A>
</UL>
</BODY>
</HTML>
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